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Barrett Larson

Barrett Larson, MD

Critical Care, Sleep Medicine, and Pulmonology

"The people I serve continually inspire and motivate me to always deliver the most comprehensive and compassionate care I can give."

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Office Information

About Me

Barrett Larson, MD, specializes in pulmonary and critical care medicine at Avera Medical Group Pulmonary & Sleep Medicine in Sioux Falls, SD. This health care field focuses on treating conditions related to the pulmonary and respiratory system, which involves structures that help you breathe well.

So when it comes to caring for the lungs, trachea and related structures, trust Dr. Larson for effective solutions for:

  • Asthma
  • COPD
  • Coughing
  • Emphysema
  • Interstitial lung disease
  • Lung cancer
  • Lung damage post severe COVID-19
  • Lung nodules
  • Pneumonia
  • Pulmonary fibrosis

Treating Patients with Patience

“What I enjoy about being a doctor is the patient relationships you develop,” said Dr. Larson. “These relationships can last years to a lifetime, so it’s a rewarding part of the job.”

He understands a complex diagnosis can cause feelings of uncertainty, fear and helplessness. To instill a sense of hope and confidence, Dr. Larson educates each patient on their condition and course of treatment. He also believes in the importance of sitting with patients and allowing them to ask questions and air their concerns.

“One of the best ways people process something is by talking; expressing themselves,” he said. “I’m honored I can be there for them when they’re in that vulnerable place.”

Active Lifestyle

When he’s not working, Dr. Larson enjoys spending time with his family and investing his heart into their activities and goals. As for personal interests, you might find him outdoors either hunting, fishing or boating.



University of South Dakota Sanford School of Medicine, Vermillion,, Medical School


Creighton University Medical Center, Omaha, NE, Internal Medicine


Creighton University Medical Center, Omaha, NE, Pulmonary and Critical Care

Professional Memberships

  • American College of Chest Physicians
  • Society of Critical Care Medicine
  • American College of Physicians
  • American Medical Association


  • American Board of Internal Medicine, Critical Care Medicine
  • American Board of Internal Medicine, Pulmonary
  • American Board of Internal Medicine, Internal Medicine 

This directory contains information about the provider members of Independent Health Care Associates, Avera Health and all Avera entities, members of the Avera Medical Group, and employed select providers with Avera McKennan, Sioux Falls, SD and Avera Marshall, Marshall, MN and physicians with hospital privileges at Avera St. Luke's, Aberdeen, SD; Avera Sacred Heart, Yankton, SD; Avera Queen of Peace, Mitchell, SD; Avera St. Mary's, Pierre, SD.

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Moving Health Forward

Avera is a health ministry rooted in the Gospel. Our mission is to make a positive impact in the lives and health of persons and communities by providing quality services guided by Christian values.

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